Damage Function
ASTM Standard
Target Material Displacement Threshold Energy [eV]
Neutron Spectral Fluence
values:
(use point "." as decimal separator)
Neutron Energy
[MeV]
Spectral Fluence
[cm-2 MeV-1]

Spectrum Interpolation:


EXAMPLE:
Copy and paste the data here to reproduce the following example. Neutron flux spectrum in ITN-ΣΣ facility, normalized to 9.305x105 n/(cm2 s):

Fluxes are derived from [Angelescu et al. (1994)].
Following are the results:

NOTE:
  • The present Neutron NIEL calculator is based on the values published on ASTM E722-09 and E722-14.
  • For ASTM E722-09 the displacement threshold energy used is 25 eV for Si and 10 eV for GaAs
  • For ASTM E722-14 the displacement threshold energy used is 20.5 eV for Si and 10 eV for GaAs
  • Currently, the lower energy limit for Neutrons NIEL is 1e-4 eV. The higher energy limit is 20 MeV.